gpio: mxs: add name_to_gpio() function

Override the default name_to_gpio() function with one that
accepts strings of the form bank:pin.  If a colon is present
in the provided name, it behaves like the default version.

This lets the "gpio" command work with sane names rather than
requiring the user to enter the bank/pin composite in decimal.

Signed-off-by: Mans Rullgard <mans@mansr.com>
Reviewed-by: Stefano Babic <sbabic@denx.de>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/gpio/mxs_gpio.c b/drivers/gpio/mxs_gpio.c
index da0199b168..b54a10b493 100644
--- a/drivers/gpio/mxs_gpio.c
+++ b/drivers/gpio/mxs_gpio.c
@@ -114,3 +114,18 @@ int gpio_free(unsigned gpio)
 {
 	return 0;
 }
+
+int name_to_gpio(const char *name)
+{
+	unsigned bank, pin;
+	char *end;
+
+	bank = simple_strtoul(name, &end, 10);
+
+	if (!*end || *end != ':')
+		return bank;
+
+	pin = simple_strtoul(end + 1, NULL, 10);
+
+	return (bank << MXS_PAD_BANK_SHIFT) | (pin << MXS_PAD_PIN_SHIFT);
+}